Air cooling by evaporization of water



Sept. 12, 1950 H. G. FORRESTER AIR COOLING BY EVAPORIZATION OF WATER 3 Sheets-Sheet 1 Filed Oct. 15, 1945 R R 0 N TE R mm D 0 w W 16 m 4 E H w 0 H u u a Sept. 12, 1950 H. e. FORRESTER 2,525,341

AIR COOLING BY EVAPORIZATION OF WATER Filed Oct. 15, 1945 3 Sheets-Sheet 2 IN VEN TOR. HER/WAN 6. FOBRESTER I mm a AITEI RN EYS Sept. 12, 1950 H. G. FORRESTER 2,521,841

AIR COOLING BY EVAPORIZATION OF WATER Filed Oct. 15. 1945 r 3 Sheets-Sheet 5 IN VENTOR.

HERMAN G. FOPRESTEP m wro.

Patented Sept. 12, 1950 UNITED. gs'rA'r-es P TEN AIR'GOOLING BY Herman G. Forrester, Knoxville, Tenn. T 3 M" v Applicationoctober '15, weasel-n1- No. 622,439 2Clai'ms. (C1. 62-139) Theinventionrelates to anair conditionin gfap-i p ratus andmore especially to an air cooling, ma chine.

The primary object of the invention is thepro vision of: amachine of this character, wherein the outside atmosphere within an enclosure can be cooled by a" heat exchange unit of novel construction and unique in the assembly thereof, the cooling being had by air and water circulation and evaporation of the latter and the cooled air diffused by forcedraft.

' water evaporatingjpanl l for -a= Another object of the invention is the provipose and inexpensive to manufacture and install.

With these [and other objects in view the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings, which show the preferred embodiment of the invention, and pointed out in the claims hereunto appended.

In the accompanying drawings- Figure l is a plan view of the machine constructed in accordance with the invention.

Figure 2 is a sectional View taken on the line 2-2 of Figure 3 looking in the direction of the arrows. I

Figure 3 is an elevation, partly broken away, and looking in the direction of the arrows following the line 3-3 of Figure 1.

Figure 4 is a sectional view taken approximately on the line 4- 4 of Figure 1 looking in the direction of the arrows.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, the machine constituting the present invention, comprises an outer cage-like shell or casing Ill having registering open window frames II and I2, respectively, fore and aft thereof, confronted by spaced upstanding front and rear honey-combed radiator-like heat exchange units l3 and [4, respectively, each having top and bottom headers l5 and I6, and such units are fixed within the shell or casing I0 which houses the same by EvAPoRizATIoN 0F TER brackets 11, wfii1e'tetwe' ni annals if this separator l8, registers with thefopen open center separator l8"? The opencent'er l frames ll andlZ for, the exposure of the honey- J combed cores 2!) of the units .,l3"and"l 4' to a bladed; fan wheel 21, aft. thereto and' this .wheeliis, a;

part ofan electric fan motor'unit22" supported b'ybrackets 23 for the carrying thereof by,the'. shell or casing Ill. v

The bottom header I E of the unit M ore througha;valved inlet 2 5 r 25, mevalvefor-themieabein fie I v 27 to. regulate thejquantity l'orgw t' deliveredltoi; such pan, g i andeopening,intoj thisheader an. outside air inlet.v conduit; 28, provided filte'rI '2glne itfto lthe point of comm uni cati the conduitwith the saidfheader l6. I. Both topheaders l5 of. the: units [3 and-illopen umvardly into a dome 3fl to theshell or, casin at. the .top. thereof, {:while. the, bottom header, of. the unit 1,4;has.cornmunication-witnan out-l line or conduit'3l at the bottom 'of the silent? casing Ill, these conduits 28 and 3| being for the circulation of air through the units. The conduit 3! may be connected to any conventional type of suction fan,.which forms no part of the present device, for withdrawing air from unit I4, I

which in turn causes air to flow into conduit 28.

Within a space 32 in the bottom area of the shell or casing I0 is a water pump 33, which has a lift pipe 34 extending upwardly between one end of the unit 13 and the said shell or casing, and has coupling with a horizontally disposed sprayer nozzle 35 overlying the said unit l3 for the spraying of water onto the latter, the said pump 33 being provided with an inlet water pipe 36 which depends within the pan 24 and this pump is operated from an electric motor ,3? which is also located in the space 32, so that water is collected from the pan and supplied by the pump to the nozzle 35, as best seen in Figure 3 of the drawings.

The machine depends on rapid evaporation of Water trickling down through the honey-combed core of the unit I3, caused by air passing upward through the same cells, resulting in a reduction in temperature within the heat exchange units I3 and I4 cooling the same. Air forced by the fan 2| through these heat exchange units is cooled by passing it through both units [3 and I4 under force by the fan wheel 2i exteriorly of the cores of the units. The water, not evaporated or carried out through the header l6 by the air entering through inlet conduit 28, falls into the pan like heat exchange units confronting the windows;

in said housing, means supplying air through said units lengthwise thereof, means above-one of said units for spraying the same at the top thereof and for trickling water therethrough, means underneath the said one unit trapping the water sprayed thereupon, means supplying additional water to the trapping means, a forced air supply passing air transversely through both said units, means rfor regulating the additional water supp1y, a filter within the firstinarned meansa separator between the units and having an open center registering with the windows in the hous-j ihg, a dome on the housing for directing air flowing lengthwise from one unit into the other unit, and top headers on the units opening into the dome; one of ,said headers enclosing the spraying means and the other of said headers placing said dome in communication with said other unit. Y

-2.A self-contained air cooling unit comprising; a-casing'having main air inlet and outlet open-1 ings iii-alignment,- a pair of parall'elly-arranged honeycomb radiator-like devices arranged sideby-side in said casing between and in alignment with said openings, a sump in said casing beneath the first of said devices, a source of water supply entering -said casing and communicating with said sump, means for controlling the level of the water in said sump fed thereto-from said source, a header having nozzles and secured 'to said casing above said first of said devices, pump 4 means for forcing water from said sump to said header whereby the water discharged from said nozzles flows downwardly through the interstices of said first device back to sump, a secondary air inlet adjacent said sump providing a source of air flowing upwardly through the interstices of said first device and in a direction opposite to the flowofiwater to effect evaporationot a portion of the same to create a cooling result'in isaid device, means above said devices directing the air from said first device toward said second device for causing the air to flow therethrough oppositely to that in said first device, a secondary air outlet underneath said second device for discharging air therefrom, a fan means mounted adjacent said main inlet opening for forcing ambient air through said devices and main casing.

openings and in a direction substantially normal to the direction of fiow=through the interstices of the devices of .the water and the air from the main inlet and main outlet openings of the REFERENCES CITED Theffollowing references are of recordin the fileot this patent:

PATENTS UNITED STATES Number Name Date 1,428,661] Richardson Sept, 12',"l922 1,923,355 Darrah Aug:' 22,1933 2,023,816 Dubrovin 1 Dec. 10', -1935 2,045,215 Coverston 'QJuiie 23,1936 2,150,514 McInnerney- Mar. 14,'19 39 2,157,531 Fisher 'May 9, 1939- 2,174,060 Niehart ;i Sept. 26, 1939;" 2,196,644 Rubel I ApnBjlQlQ HERMAN G. FOR ESTERQ P w e a a es? 

